An individual with achlorhydria (lack of or low gastric acid in stomach) may have abdominal pain due to difficulty digesting food, loose bowel movements & problems due to poor absorption of nutrients.
Foods for Good Digestion # 8: Cod liver oil. Cod liver oil is loaded with vitamin A and vitamin D. The presence of these vitamins is essential to keep the digestive tract healthy and also prevents in the development of various digestive problems in the GI tract.
Best: Fennel seeds. Fennel is a digestive tract savior. The seeds have a compound that relaxes GI spasms, which allows gas to pass and relieve bloating, says Sass. You can find fennel and fennel seeds in breads, sausages, and other meat dishes.